Cervical screw



FIG. 1 is a front, top, right perspective view of a cervical screw showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front, bottom, right perspective view thereof.

The broken lines in FIGS. 1, 6 and 8 depict portions of the cervical screw that form no part of the claimed design. 

CLAIM The ornamental design for a cervical screw, as shown and described. 